From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 23 Jan 2001 23:18:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 23 Jan 2001 23:18:48 -0500 Received: from pneumatic-tube.sgi.com ([204.94.214.22]:12624 "EHLO pneumatic-tube.sgi.com") by vger.kernel.org with ESMTP id ; Tue, 23 Jan 2001 23:18:41 -0500 Message-ID: <3A6E573D.5210644C@sgi.com> Date: Tue, 23 Jan 2001 20:17:01 -0800 From: Linda Walsh X-Mailer: Mozilla 4.72 [en] (X11; I; Linux 2.4.0 i686) X-Accept-Language: fr, en MIME-Version: 1.0 To: Andre Hedrick CC: Florin Andrei , lkml Subject: Re: 2.4 disk speed 66% slowdown... In-Reply-To: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Mine was actually out of a stock 2.2.17 -- I tried your patch in an attempt to fix a disk problem - but the disk was just going bad and the slow speeds were coming from the automatic sector remapping. pardon my ignorance, but where do you get UDMA-100-66? Here is the hdparm -i output on 2.4: /dev/hda: Model=IBM-DARA-225000, FwRev=SHAOA54A, SerialNo=SQASQ202564 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=3(DualPortCache), BuffSize=418kB, MaxMultSect=16, MultSect=off DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=2 CurCHS=17475/15/63, CurSects=16513875, LBA=yes, LBAsects=49577472 tDMA={min:120,rec:120}, DMA modes: mword0 mword1 mword2 IORDY=on/off, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4 UDMA modes: mode0 mode1 *mode2 mode3 mode4 Drive Supports : ATA/ATAPI-4 T13 1153D revision 17 : ATA-1 ATA-2 ATA-3 ATA-4 UDMA mode (2) seems to be identical to before. Andre Hedrick wrote: > > On Tue, 23 Jan 2001, Florin Andrei wrote: > > > Linda Walsh wrote: > > > > > > The REAL problem was in disk performance. The apm made no difference: > > > > Same problem here. I had a huge HDD performance drop when upgrading > > from 2.2.18 to 2.4.0 > > It's an Intel i815 motherboard, and the HDD is Ultra-ATA. > > ER, were you getting UDMA-100-66 out of 2.2.18 stock? > Now what are you getting in 2.4.0? -- Linda A Walsh | Trust Technology, Core Linux, SGI law@sgi.com | Voice: (650) 933-5338 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/